Pymediainfo

* Add an argument to pass custom options to the parse method (71)
* Update bundled MediaInfo to [v19.09](https://github.com/MediaArea/MediaInfoLib/releases/tag/v19.09) (Windows and OSX wheels)

* Drop Python 2.6 compatibility
* Allow pickling of Track instances (68)
* Remove xml attributes from `Track` and `MediaInfo` objects, populate the `tracks` attribute immediately (03f6242bf6d3d7cf0afaa4156397971f152fa922)
* Implement `__eq__` for`Track` and `MediaInfo` objects
* Add an option to obtain MediaInfo's text output (66)
* Add an option to return non-complete MediaInfo (66)
* Disable `LegacyStreamDisplay` explicitly by default, make it configurable (see 9aa65d8387723e6c32c1570d67c4c9c019ad3cbc for details)

* Generate sdists on Linux instead of OSX (67)

* Publish wheels containing libmediainfo (59, thanks to bgermann)

* Add an option to control parsing speed (65)

* Do not ignore exceptions when invalid XML is passed (53)
* Raise RuntimeError if parsing fails
* Add an option to ignore UTF-8 encoding errors, fixes (54)
* Use proper XPath to detect track elements in XML (55)
* Fix handling of non-existent files
* Fix tests with libmediainfo ≥ 18.08 (58)
* Try to load libmediainfo from the module folder